WorldView-2
WorldView-2 Samples
About the WorldView-2 Satellite
WorldView-2 Quick Stats
Resolution: 46 cm* Swath Width: 16.4 kilometers at nadir
New Spectral Bands: coastal, yellow, red edge, Near-IR2 Collection Capacity: 975,000 sq km/day**
Slew Time: 300 km in 9 seconds Average Revisit: 1.1 days

With a mission life of 7.25 years, and operating at an altitude of 770 km, the WorldView-2 system is expected to bring unsurpassed agility, capacity, accuracy and spectral diversity to commercial earth imaging.

Greater Agility

WorldView-1 and WorldView-2 are the first commercial satellites to have control moment gyroscopes (CMGs). This high-performance technology provides acceleration up to 10X that of other attitude control actuators and improves both maneuvering and targeting capability. With the CMGs, slew time is reduced from over 60 seconds to only 9 seconds to cover 300km. This means WorldView-2 can rapidly swing precisely from one target to another, allowing extensive imaging of many targets, as well as stereo, in a single orbital pass.

Higher Capacity/Faster Revisit

With its improved agility, WorldView-2  acts like a paintbrush, sweeping back and forth to collect very large areas of multispectral imagery in a single pass. WorldView-2 alone has a collection capacity of 975,000 sq km per day, doubling the collection capacity of our constellation. And the combination of WorldView-2’s increased agility and high altitude enables it to typically revisit any place on earth in 1.1 days. When added to our constellation, revisit time drops below one day and never exceeds two days, providing the most same-day passes of any commercial high-resolution satellite constellation.

Better Accuracy

WorldView-2’s advanced geopositional technology is allowing for significant improvements in accuracy as well. The accuracy specification has been tightened to 6.5m CE90 right off the satellite, meaning no processing, no elevation model and no ground control. With WorldView-1, and anticipated for WorldView-2, the measured accuracy is coming in at a remarkable 4.1m CE90.

Most High Resolution Spectral Bands

WorldView-2 provides the only high-resolution 8-band multispectral commercial satellite imagery available. Along with the four typical multispectral bands: Blue (450-510), Green (510-580), Red (630-690) and NearIR (770-895), WorldView-2 is introducing the following new color bands for enhanced multispectral analysis:


  WorldView-2 Spectral Response Overview

  • Coastal Band (400 - 450 nm):
    This band supports vegetation identification and analysis, and supports bathymetric studies based upon its chlorophyll and water penetration characteristics. Also, this band is subject to atmospheric scattering and will be used to investigate atmospheric correction techniques.

  • Yellow Band (585 - 625 nm):
    Used to identify "yellow-ness" characteristics of targets, important for vegetation applications. Also, this band assists in the development of "true-color" hue correction for human vision representation.

  • Red Edge Band (705 - 745 nm):
    Aids in the analysis of vegetative condition. Directly related to plant health revealed through chlorophyll production.

  • Near Infrared 2 Band (860 - 1040 nm):
    This band overlaps the NIR 1 band but is less affected by atmospheric influence. It supports vegetation analysis and biomass studies.


* Distribution and use of imagery at better than .50 m GSD pan and 2.0 m GSD multispectral is subject to prior approval by the U.S. Government.

** Panchromatic collection

More Information
Documents:
- WorldView-2 Datasheet | PDF
- Constellation Guide | PDF
- Spectral Response Overview | PDF
- Capacity Datasheet | PDF
- Bathymetry Datasheet | PDF
- Vegetative Analysis Datasheet | PDF
- Feature Classification Datasheet | PDF
- 8-Band Applications Whitepaper | PDF
Webinars:
Tracking WorldView-2
Stage:
Full Operational Capability, Jan 4 2010
Launch Date: October 8, 2009
View WorldView-2 Images
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